Question

Check my answer

Answer 1

1. A school club uses a telephone chain to inform members of changes in plans. The club president calls 2 members, each of whom calls 2 members, and so on. The process must be repeated 5 times. How many members are in the club?

Answer 2

a1=1
r=2
n=5
\[\frac{ 1(1-2^{5}) }{ 1-2 }= 31\]
or would a1 be 0???